The most identifiable difference in the new Recharge Collection between models that are and are not classified as "Hybrid" is the coil count. Rechargemattresses have 800 or 850 wrapped pocket coils in the innerspring, while the Recharge Hybrid models have 1,000.

Another distinction is in the cover. Recharge mattresses have SurfaceCoolFiber, a blend that includes Tencel (also known as Lyocell), a derivative of rayon which is used for its moisture-wicking properties. It is used in performance fabrics to keep users dry and cool. Cool, because the moisture evaporates.

On the other hand, Recharge Hybrid mattress covers use the Simmons BeautyrestEvenloft® Panel. This is a super stretch knit fabric which offers extra conformity. This is to complement the memory foam, which predominates in the Recharge Hybrid sub-collection.

There are other distinctions. Some of these reflect upgrades to the lines. But first, what is in common to all Recharge mattresses, hybrid or not?

All Beautyrest Recharge mattresses rely on individually wrapped pocket coils for their support. The Beautyrest brand was established by Simmons Bedding Company to market mattresses using the new pocket coils patented by former Simmons engineer James Marshall. These coils respond independently to the sleepers' bodies to relieve pressure and support the spine. They also isolate motion so that one partner's movements do not disturb the other.

They also utilize Simmons Beautyrest's AirCool® GelMemoryFoam. This memory foam is infused with gel and structured for airflow to keep the mattress cool.

Both kinds of Recharge Collection models also share foam encasement with AirCool® BeautyEdge™ Foam. Foam encasement protects the pocket coils and keeps them in place. At the same time, it serves as edge support for the sleeping surface. The problem with foam encasement is that it can be a barrier to airflow. As can be seen in the the cutaway views of Recharge mattresses, the BeautyrestEdge foam rail is ventilated by a row of pores to let air pass through. This air can then flow through the pocket coil array and through the ventilated foams above.

Besides AirCool® GelMemoryFoam, the non-hybrid Recharge mattresses also use GelTouch® Foam, a gel-infused foam which is not memory foam. It is just above the AirCool, tempering the conformity of the memory foam. This is for users who want more resiliency than memory foam has.

To the AirCool® GelMemoryFoam, Beautyrest Recharge Hybrid mattresses add AirCool® MemoryFoam and AirCool® MaxMemoryFoam above. This continues the cooling flow of air without adding more gel. Unlike the non-hybrid models, it continues memory foam clear to the top. This is what makes these mattresses "hybrid." The memory foam is an essential ingredient in the support of the mattress.

There are other components that individual models add, especially the higher level mattresses, such as EnergyFoam, AirFeelFoam, BeautyCloud™ MemoryFoam, and ContourFit™ GelMemoryFoam.

All of these models are available through several retailers. Some retailers have their own names for these mattresses. For some, such as US-Mattress, this is to distinguish those sold online from those in their stores.